1999 Cadillac STS Exhaust Mufflers

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Northstar Engines and System Technical Discussion Discussion, 1999 Cadillac STS Exhaust Mufflers in Cadillac Engine Discussion; Hi, Can anybody help me identify a set of performance mufflers for a UK Spec 1999 Cadillac STS? I live ...
  1. #1
    gordi_chief is offline Cadillac Owners Member
    Join Date
    Apr 2006
    Glasgow Scotland

    1999 Cadillac STS Exhaust Mufflers

    Can anybody help me identify a set of performance mufflers for a UK Spec 1999 Cadillac STS?
    I live in Scotland so I would need the manufacturer, part number & supplier so I can order the correct ones from the US.

    I'm not looking for a "Catback" system, just some better flowing slip on mufflers that have a deeptone note without too much noise & resonance. Dynomax & Borla are 2 of the US types I have been looking at but I would like to ask your advice on exact fitment. State the dimensions of the mufflers if known.

    Please also advise if the OE spec mufflers can be modified (drilled) or if anybody has tried "cherry bombs" or "glasspacks".

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  3. #2
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Albuquerque, NM

    Re: 1999 Cadillac STS Exhaust Mufflers

    The Dynomax mufflers sound like they'd be what you're looking for. You're not going to gain much performance wise by simply changing mufflers, but it will sound nice. As for the exact dimensions, you can measure the ones on your car for a direct replacement, or go with a shorter case muffler which will be a bit louder.

    Glasspacks (cherry bombs) would be really loud, I'd advise against that idea.

  4. #3
    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 Escalade 6.0L 2WD, 2007 Jeep Grand Cherokee Limited CRD
    Join Date
    Jan 2003
    Gales Ferry, CT

    Re: 1999 Cadillac STS Exhaust Mufflers

    I know you don't want a cat-back, but you really can't go wrong with the Corsa cat-back. The 23 HP gain AND the awesome sound is worth it! The downside would be the price. It's also great because when cruising it's not too loud, until you get on the throttle! It will be hard finding some aftermarket mufflers that don't have the resonance.

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